Because projections of manpower requirements can be an important factor in educational planning, it is important that the planner understand how they are undertaken and be able to participate in them, particularly in discussing matters of direct relevance to education. This lecture provides an introduction to the principles and the problems involved in manpower projections for educational planning. It considers (1) analysis of the existing situation of education and employment in order to prepare the basis for an educational plan that takes account of employment requirements and possibilities; (2) the main practices and principles involved in preparing a perspective plan for education in the light of manpower needs; and (3) some objections to the manpower approach to educational planning. (Author/IRT)